❓Что будет на выходе?

const defaultSettings = {
  theme: 'light',
  notifications: true,
  location: 'USA'
};

const userSettings = {
  theme: 'dark',
  location: 'Canada'
};

const finalSettings = {
  ...defaultSettings,
  ...userSettings
};

console.log(finalSettings);

Ответ: { theme: 'dark', notifications: true, location: 'Canada' }

JavaScript test | #JavaScript